diff-parseopt: convert --patience

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff.c b/diff.c
index c4cd84f1b39565ea186ce98082c06a872dd83dc0..7899c7cc065d911f85700acaa8e9a6880da73d1c 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -4960,6 +4960,26 @@ static enum parse_opt_result diff_opt_output(struct parse_opt_ctx_t *ctx,
        return 0;
 }
 
+static int diff_opt_patience(const struct option *opt,
+                            const char *arg, int unset)
+{
+       struct diff_options *options = opt->value;
+       int i;
+
+       BUG_ON_OPT_NEG(unset);
+       BUG_ON_OPT_ARG(arg);
+       options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
+       /*
+        * Both --patience and --anchored use PATIENCE_DIFF
+        * internally, so remove any anchors previously
+        * specified.
+        */
+       for (i = 0; i < options->anchors_nr; i++)
+               free(options->anchors[i]);
+       options->anchors_nr = 0;
+       return 0;
+}
+
 static int diff_opt_relative(const struct option *opt,
                             const char *arg, int unset)
 {
@@ -5127,6 +5147,10 @@ static void prep_parse_options(struct diff_options *options)
                OPT_BIT(0, "indent-heuristic", &options->xdl_opts,
                        N_("heuristic to shift diff hunk boundaries for easy reading"),
                        XDF_INDENT_HEURISTIC),
+               OPT_CALLBACK_F(0, "patience", options, NULL,
+                              N_("generate diff using the \"patience diff\" algorithm"),
+                              PARSE_OPT_NONEG | PARSE_OPT_NOARG,
+                              diff_opt_patience),
 
                OPT_GROUP(N_("Diff other options")),
                OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
@@ -5165,18 +5189,7 @@ int diff_opt_parse(struct diff_options *options,
                return ac;
 
        /* xdiff options */
-       if (!strcmp(arg, "--patience")) {
-               int i;
-               options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
-               /*
-                * Both --patience and --anchored use PATIENCE_DIFF
-                * internally, so remove any anchors previously
-                * specified.
-                */
-               for (i = 0; i < options->anchors_nr; i++)
-                       free(options->anchors[i]);
-               options->anchors_nr = 0;
-       } else if (!strcmp(arg, "--histogram"))
+       if (!strcmp(arg, "--histogram"))
                options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF);
        else if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) {
                long value = parse_algorithm_value(optarg);